Malicious PDF — malware analysis report

Static analysis result for SHA-256 c973ec07245bc456…

MALICIOUS

PDF

75.3 KB Created: 2021-03-19 08:26:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcd76ba8650d216a1fae7a65b958de3c SHA-1: 721ced290224d30dc042b780bf23105c7f19a778 SHA-256: c973ec07245bc4565d24983ecebf964c53295ece7151f1665fc8715ab990f437
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document employs a link farm technique, embedding numerous external URLs to obscure the primary malicious destination. The heuristic firings indicate a phishing and malware distribution attempt, with ClamAV specifically identifying it as 'Pdf.Phishing.Trojan'. The document's content, though heavily obfuscated, suggests a lure related to 'harry potter' to entice users to click on the embedded malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/wix?keyword=always+harry+potter
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/00ce0fa6f3c5ab.pdf
    • https://zivotawab.weebly.com/uploads/1/3/4/5/134576919/galebo-mabalo-mukojapinifom.pdf
    • https://bawezinanowele.weebly.com/uploads/1/3/4/3/134305895/pufeve_gukatafidimu_duwitasosasa_fajizusulu.pdf
    • http://megidexabaror.mywebcommunity.org/good_romance_books_to_read_for_adults.pdf
    • http://nomokesus.sportsontheweb.net/robonewa.pdf
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/2e5be911a0f0.pdf
    • https://folutiniku.weebly.com/uploads/1/3/1/8/131871586/poxesagajufomu-jugaxubid-turusizago-jarefiza.pdf
    • http://befotuke.mywebcommunity.org/76945566617.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_f2af7e44b51342228b9cbff12fac565f.pdf?index=true
    • https://s3.amazonaws.com/bugutaj/jodigokasot.pdf
    • https://79ab8074-8148-4faa-9219-f6cdfa35bc15.filesusr.com/ugd/99e004_1adf67d6ea204abdbbded4dbe1188083.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a967fdd6-4ec2-460f-921b-ddaf03f369e5/american_red_cross_summer_youth_volunteer_program.pdf
    • http://pusapovewazigu.onlinewebshop.net/how_to_use_breville_air_fryer.pdf
    • https://uploads.strikinglycdn.com/files/a214c39b-7b7e-4240-825d-53346f97be1b/22680780923.pdf
    • https://s3.amazonaws.com/pobixedele/yowhatsapp_mod_apk_terbaru_2018.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_20be574405d44072bce350ded1ba7407.pdf?index=true
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_c23e5f6e6eb346448ccc90f7c6c0b618.pdf?index=true
    • https://uploads.strikinglycdn.com/files/83d1bc48-c167-4e9b-9914-980868114010/76212195365.pdf
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_ea4f3fd302014e6582916e5a8bbf5a6c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e802.bin
a74d21719ba97dc35abdb4f137dee15e53f72c9e994ace5cb6d56796c71f6d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE802 5092 bytes
font_01_sfnt_off0000f963.bin
b38f656a183b28e1ecefae6381295b67beb6328742c945a9f61c421e41d1e25f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 11528 bytes

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